Exchanging The Electronics Module - Vega VEGABAR 66 Operating Instructions Manual
Submersible pressure transmitter with
certec measuring cell
Hide thumbs
Also See for VEGABAR 66:
- Operating instructions manual (80 pages) ,
- Operating instructions manual (80 pages) ,
- Operating instructions manual (80 pages)
Table of Contents
Advertisement
8 Maintenance and fault rectification
48
Product temperature 40 °C, reference temperature 20 °C
VEGABAR 66 with measuring range 0.2 bar
Deviation < 0.1 %
Calculation ΔT: ΔT = 40 °C - 20 °C = 20 K
Calculation of the set Turn Down:
TD = 200 mbar/147 mbar, TD = 1.4
Basic accuracy digital output signal in percent:
F
= √((F
)
+ (F
)
)
2
2
perf
T
Kl
F
= 0.05 %/10 K x TD
T
F
= 0.1 %
Kl
F
= √((0.05 %/10 K x 20 K x 1.4)
perf
F
= 0.17 %
perf
Total deviation digital output signal in percent:
F
= F
+ F
total
perf
stab
F
= 0.1 %/year x TD
stab
F
= 0.1 %/year x 1.4
stab
F
= 0.14 %
stab
F
= 0.17 % + 0.14 % = 0.31 %
total
Total deviation digital output signal absolute:
F
= 0.35 % x 147 mbar/100 % = 0.46 mbar = 4.7 mm
total
Basic accuracy analogue output signal in percent:
F
= √((F
)
+ (F
)
2
2
perf
T
Kl
F
= 0.05 %/10 K x TD
T
F
= 0.1 %
Kl
F
= 0.15 %
a
F
= √((0.05 %/10 K x 20 K x 1.4)
perf
F
= 0.23 %
perf
Total deviation analogue output signal in percent:
F
= F
+ F
total
perf
stab
F
= 0.1 %/year x TD
stab
F
= 0.1 %/year x 1.4
stab
F
= 0.14 %
stab
F
= 0.23 % + 0.14 % = 0.37 %
total
Total deviation analogue output signal absolute:
F
= 0.37 % x 147 bar/100 % = 0.54 mbar = 5.5 mm
total
8.4
Exchanging the electronics module
In case of a defect, the electronics module can be exchanged by the
user against an identical type. If no electronics module is available on
site, the module can be ordered through the agency serving you.
+ (0.1 %)
2
+ (F
)
)
2
a
+ (0.1 %)
2
VEGABAR 66 • Foundation Fieldbus
)
2
+ (0.15 %)
)
2
2
Advertisement
Table of Contents
